US 11,054,676 B2
SAW modulators with phase and angle selective optical coatings
Ian Ward Frank, Arlington, MA (US); Jeffrey A. Korn, Lexington, MA (US); Steven J. Byrnes, Watertown, MA (US); and Dennis M. Callahan, Jr., Wellesley, MA (US)
Assigned to The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US)
Filed by The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US)
Filed on May 25, 2018, as Appl. No. 15/989,437.
Claims priority of provisional application 62/511,111, filed on May 25, 2017.
Prior Publication US 2018/0341127 A1, Nov. 29, 2018
Int. Cl. G02F 1/11 (2006.01); G02F 1/125 (2006.01); G03H 1/22 (2006.01); G02F 1/335 (2006.01); G03H 1/02 (2006.01)
CPC G02F 1/11 (2013.01) [G02F 1/125 (2013.01); G02F 1/335 (2013.01); G03H 1/2294 (2013.01); G02F 2203/24 (2013.01); G03H 2001/0224 (2013.01); G03H 2225/21 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A surface acoustic wave (SAW) modulator, including:
a SAW substrate;
a waveguide in the SAW substrate; and
one or more coating layers that are applied to a face of the SAW substrate to improve coupling of guided modes of the waveguide into leaky modes to adjust a phase of one or more plane waves forming the leaky modes to provide improved coupling of the guided modes to the leaky modes over a range of angles.